Quickly bonding, cement-based glue designed for connecting large elements of live or ceramic rock. It does not contain toxic compounds, which makes it perfectly safe for fish and invertebrates. How to use: mix small amount of glue with water until consistency gets homogeneous. Immediately start sticking the elements. Stone Fix is recommended to be used outside the tank. In case of necessity of using underwater, all circulatory and shunt pumps should be switched off. After linking individual pieces leave for bonding for 15 minutes.